I would agree with your own MA and assessment. Those are not "bad" turns. They do lack "shape" Please be aware we can be very nitpicky about some of this.. this is some pretty good skiing.
There is a quick push/steer to get the skis turning in those first turns, then in the apex a very short amount of shaping, followed by a rather static across the hill ride to the next turn. Those are more shmedium radius and I would classify them as almost a "z" shaped turn.
The edges do engage just before or at the fall line but it's almost like you pushed them to the edge angle rather than guide them get that edge angle and have the skis actually "pull" you into the turn.
In the second set those are not really z turns but a very long drawn out "s" turn. rather than a "c" turn. Speed does look like it gets a little faster and faster. It doesn't appear to be very steep but that may just be the camera angle.
They are about the right width for a short radius but I think you are looking for (by your first post) a more steered, (or in the terms SSG uses "brushed carve") tight radius yet shaped "C" type turn.
I am liking the thought of you really practicing your pivot slips. A LOT. then start thinking about sliding (sideways) fast (fast is relative you don't need to go mach speed) and turning your feet slowly through the pivot. Still keeping our skis in that narrow corridor. This will take a lot of repetitions. I mean a LOT. Learn to balance on the new down hill ski (not brace) and use a lot of extension to release your edges and flexion for speed control during the slide sideways. You will need quite a bit of counter to really make these easier and more efficient. Did I mention LOTS of repetitions to master this and make it feel real "easy"
As you begin to learn to pivot slow and still maintain a smooth slide sideways, you will now be finding the real fine edge control and rate of rotation needed to start making those short radius shaped turns (actually all your round shaped turns)
Now start adding a little more of an edge set at right before you start your next pivot. a slight bit more movement of your COM towards what would be the apex of your turn to release your edges and allow the skis to track a little out of the "boots on the straight line" mentality and shape the pivot into a roundish pivot. Bring them around to across the fall line and repeat. Ski in and out of counter staying faced down the hill.
You should be able to continue to gradually increase speed, adjust DIRT and how dynamic these are until you are making nice shaped short radius turns.